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Overview In this tutorial, you will learn how to use a soil moisture sensor. Practical examples are also provided to help you master the code. What You Will Learn How soil moisture sensors work How to use soil moisture sensor with Arduino Soil Moisture Sensor - How Does It Work? The soil moisture sensor consists of two probes that measure the volume of water in the soil. The two probes allow the electric current to pass through the soil and, according to its resistance,...

DHT22 Temperature Humidity Sensor Features The DHT22 Temperature Humidity Sensor is a great choice for measuring ambient temperature and humidity. This sensor consists of a capacitive humidity sensor and a heat resistor. The DHT22 sensor has a wide range of temperature and humidity measurement. It can measure temperature in range of -40 to +125 degrees Celsius with 0.5 degrees Celsius accuracy. Humidity is measured in range of 0 to 100% with 2.5% accuracy. This sensor transmits data through a single di...

SHT10 Temperature Humidity Sensor Features The SHT10 module is a high accuracy sensor for measuring temperature and humidity. This module can be easily connected to a variety of microcontrollers using two digital output pins. One for data transfer and the other for adjusting data transfer speed between the module and the microcontroller. The range of temperature measurement is -40 to +123.8 degrees Celsius with 0.01 degrees Celsius accuracy. The humidity range is 0 to 100% with 0.05% accuracy. This module i...

SHT31 Temperature Humidity Sensor Features The SHT31 sensor module is a temperature and humidity sensor with high accuracy and quick response time. Specifications: Temperature measurement range: -40 to +90 degrees Celsius Temperature measurement accuracy: 3 degrees Celsius Humidity measurement range: 0 - 100% RH Humidity measurement accuracy: 2% RH Communication protocol: I2C Data transition: up to 1MHz frequency Address pin included: To adjust I2C protocol address ...

DHT21/AM2301 Temperature and Humidity Sensor Features The AM2301 / DHT21 temperature and humidity sensor consists of two sensors: A capacitive humidity sensor and a thermistor. This sensor transmits data using a single digital pin, so it can communicate with the microcontroller using only one digital pin. The sampling frequency is 0.5Hz, which means that you can get new data every two seconds. DHT21/AM2301 Temperature and Humidity Sensor Pinout This Module has 3 w...

TTP224 Capacitive Touch Sensor Module Features This 4 Channel Capacitive Touch Sensor Module uses the TTP224 IC and is actually a combination of 4 capacitive touch sensors. This module has 4 outputs, by touching each button from 1 to 4, the corresponding output will be High. There are also 4 LEDs on the module that will turn on by touching each button. TTP224 Capacitive Touch Sensor Module Pinout This module has 12 pins and 4 touch buttons:6 pins on the Right:OUT1: ...

KY-039 Heartbeat Sensor Module Features The KY-039 heartbeat sensor module can be used to detect the heartbeat signal using finger. This sensor has an analog output. By placing your finger on the module, you can see the heartbeat signal through the analog output pin. KY-039 Heartbeat Sensor Module Pinout This module has 3 pins:S: Analog output signalVCC: Module power supply – 5VGND: GroundYou can see the pinout of this module here. ...

BME280 Sensor Module Features The BME280 sensor module is a high-accuracy module for measuring temperature, humidity and atmospheric pressure. The key features are:Temperature Measuring range: -40 to +80 degrees Celsius; Accuracy: 1 degree Celsius In the range of 0 to +65 and 1.5 degrees Celsius out of this rangehumidity: 0-100%RH; Accuracy: 3%RH.pressure: 330hPa to 1100hPa. Accuracy: 1hPaThis module also calculates altitude indirectly using atmospheric pressure. The communication protocol of this sens...

HW-M10 Microwave Sensor Module Features The HW-M10 microwave sensor module is very accurate and widely used for motion detection in alarm and security systems. This module, like the PIR module, can detect any movement. The only difference is that instead of using radiation emitted by or reflected from objects, it uses microwave Doppler radar technology. This module has a digital output that is normally Low and becomes High (3.3V) if it detects motion and remains High for 2 to 3 seconds. ...

MPR121 Capacitive Touch Sensor Features The MPR121 capacitive touch sensor module is a high-precision touch sensor. This module has 12 touch buttons and supports I2C communication and can be easily interfaced with any microcontroller. There is no regulator on the board, so the supply voltage should be between 1.7 to 3.6VDC. MPR121 Capacitive Touch Sensor Pinout This module has 18 pins:6 Pins on the left:VCC: Module power supply – 3.3VIRQ: Interrupt outputSCL: Se...